Basicly, the defence has no link with the JAZZ system as such. One can play JAZZ16 but keep the defence that they are used to. As an active bridge player you spend on the average 2/3 of your active playtime defending. So it is worthwhile to have clear agreements on this facet of the bridge sport. On these pages we layout our road of defence.
Intervening the auction started by the opponents can have several good reasons :
These goals depend on the level of the opening : if opened on level 1 (eg.1NT) the target will be to disturb, while after a preemptive opening we will try to find our contract to play.
Double (Two Way)
Obviously, a double will only serve the second goal and therefore is 'take-out'.
Against an announced transfer
When opponents do a transfer, there is suddenly an opportunity to send useful information towards partner :